#include <stdio.h>

#define LOWER 0    /* 下限 */
#define UPPER 300 /* 上限 */
#define STEP 20  /* 步长 */

int main(){
  float fahr;

   for(fahr = LOWER; fahr <= UPPER; fahr= fahr+STEP){
    printf("%3.0f \t %6.1f \n", fahr, (5.0/9.0)*(fahr-32) ); //对齐功能
  }

}

/*
%.0f \t %.1f \n
0    -17.8
20   -6.7
40   4.4
60   15.6
80   26.7
100    37.8
120    48.9
140    60.0
160    71.1
180    82.2
200    93.3
220    104.4
240    115.6
260    126.7
280    137.8
300    148.9
-------------------

%3.0f \t %6.1f \n
  0     -17.8
 20      -6.7
 40       4.4
 60      15.6
 80      26.7
100      37.8
120      48.9
140      60.0
160      71.1
180      82.2
200      93.3
220     104.4
240     115.6
260     126.7
280     137.8
300     148.9
*/